1242161453 has 4 divisors (see below), whose sum is σ = 1337712348. Its totient is φ = 1146610560.

The previous prime is 1242161419. The next prime is 1242161467. The reversal of 1242161453 is 3541612421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3541612421 = 739 ⋅4792439.

It can be written as a sum of positive squares in 2 ways, for example, as 858079849 + 384081604 = 29293^2 + 19598^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242161453 - 2²⁰ = 1241112877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242161353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47775428 + ... + 47775453.

It is an arithmetic number, because the mean of its divisors is an integer number (334428087).

Almost surely, 2^1242161453 is an apocalyptic number.

1242161453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1242161453 is a deficient number, since it is larger than the sum of its proper divisors (95550895).

1242161453 is an equidigital number, since it uses as much as digits as its factorization.

1242161453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95550894.

The product of its digits is 5760, while the sum is 29.

The square root of 1242161453 is about 35244.3109309857. The cubic root of 1242161453 is about 1074.9609368895.

Adding to 1242161453 its reverse (3541612421), we get a palindrome (4783773874).

The spelling of 1242161453 in words is "one billion, two hundred forty-two million, one hundred sixty-one thousand, four hundred fifty-three".